The mass spectra of ureide-type noncyclic polyethers with 2(3H)-benzoxazolone as end groups were studies.

究了以2（3H）-苯并唑酮为端基、具有酰脲结构的非环多醚化合物的。

A raw rubber for millable polyether polyurethane elastomer was prepared.

制了一种新的聚醚聚胶。